I recently acquired a flat screen tv in Animal Crossing: New Leaf, and I was wondering if it is possible to place objects such as these on top of other furniture (desks, tables etc,)? It looks strange to me to have objects like tv's and lamps sitting on the ground.

Some tables and end tables you can place stuff ontop of, yes. However, I think that big flatscreen tv is too big to place on other items. Only lamps, busts, and other small items can be placed on tables.

Stay safe, kids: Make sure to save frequently during multiplayer, and always use a stylus!